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What is Hyperemesis Gravidarum? Hyperemesis gravidarum is a severe and persistent form of morning sickness that occurs during pregnancy. While morning sickness is common in early pregnancy and often involves mild nausea and vomiting, hyperemesis gravidarum is characterized by excessive, unrelenting nausea and vomiting that can lead to dehydration, electrolyte …

What is Hennekam Syndrome? Hennekam syndrome, also known as Hennekam lymphangiectasia-lymphedema syndrome (HS), is an extremely rare genetic disorder characterized by a variety of physical and developmental abnormalities. It falls under the category of lymphatic dysplasia disorders, affecting the lymphatic system, which is responsible for maintaining the body’s fluid balance …

Overview Herniated disc, often referred to as a slipped disc or ruptured disc, is a common spinal condition that can cause discomfort and pain. It occurs when the outer layer of a spinal disc, which acts as a cushion between the vertebrae, weakens or tears, allowing the inner gel-like material …

Definition Horner syndrome is a condition impacting the eye and adjacent facial tissues on one side, arising due to the paralysis of specific nerves. This syndrome can manifest at any stage of life; approximately 5 percent of those affected have it since birth (congenital). Horner syndrome is marked by the …

What is Hemifacial Spasm? Hemifacial spasm causes involuntary painless twitching on one side of the face due to malfunctioning of the seventh cranial nerve, also known as the facial nerve. It causes the muscles on one side of the face to contract. In its mildest form, the condition may cause …

Definition Hearing loss, or hearing impairment, is the partial or total inability to hear sounds in one or both ears. It can range from mild to profound and can be caused by factors such as age, exposure to loud noises, genetic conditions, illnesses and infections, ototoxic medications, or trauma. It …

Definition Henoch-Schönlein purpura (HSP) is a rare inflammatory disease of the small blood vessels (capillaries) and is usually a self-limited disease. It is the most common form of childhood vascular inflammation (vasculitis) and results in inflammatory changes in the small blood vessels. The symptoms of HSP usually begin suddenly and …

Definition Hemolytic anemia is a medical condition in which the life span of red blood cells is either reduced or prematurely destroyed.The condition of red blood cells being destroyed is called hemolysis. Red blood cells act as a transport medium to carry oxygen to all parts of the body. If …